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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) §5.3 Summation versus Integration, #35 · Calculus · Integrals

Suppose … rectangles with base … touch the graph of … at…

Suppose $n$ rectangles with base $Δ x$ touch the graph of $v (x)$ at the points $x = Δ x, 2Δ x, \dots, n Δ x$ . Express the total rectangular area in sigma notation.

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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) · §5.3 Summation versus Integration, #35

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